Motorcycle frame



FIG. 1 is a perspective view showing my new design;

FIG. 2 is a right side view;

FIG. 3 is a left side view;

FIG. 4 is a top view;

FIG. 5 is a front view; and,

FIG. 6 is a rear view.

The broken lines shown in the drawing form no part of the claimeddesign.

The ornamental design for a motorcycle frame, as shown and described.